The owner of this deck hasn't added a sideboard, they probably should...
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You could try adding in Impact Tremors (Dragons of Tarkir Common) to give your tokens a little more usefulness alongside Purphoros!
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Another suggestion would be to ramp up the token generation. Raise the Alarm, Lingering Souls and Spectral Procession would do pretty well considering your color choices. You could also run Intangible Virtue to give your tokens +1/+1 and Vigilance!